Kpn Travels — service complaints

I have booked a ticket from salem to tirunelveli on 26.11.2019. Ticket number is k[protected]. I have booked it for my daughter whose age is 17. Without any prior information the helper informed that the bus will be only upto madurai. I had informed to the office and also to the concern general manager. But unable to find a solution. This has created me as well as my family members in deep trouble. I require some clarifications in this regard fro the concern authority.

1. Reason for stopping the bus in madurai itself instead of moving to tirunelveli
2. Why there is no intimation in advance
3. The ticket cost is paid for tirunelveli.
4. How can this be trusted in future.

Expecting the reply at the earliest.